Starrett 50043 Combination Square Set 12in 4 Piece

Product Description

The STARRETT 50043 is a 4-piece combination square set built for layout, inspection, and measurement work in the field or shop. The set includes a 12-inch hardened steel blade graduated in 16R style, with markings at 1/32, 1/64, 1/100, and 1/50 inch increments for versatile readout options. The set ships with three head types: a square head, a center head, and a protractor head, all cast from iron for rigidity and long-term dimensional stability. Licensed tradespeople, machinists, pipefitters, and general contractors rely on combination square sets like this one for scribing, angle-setting, and depth measurement across a wide range of installation and fabrication tasks.

This combination square set is appropriate for general trade use including HVAC, plumbing, electrical rough-in, and light fabrication work. The 12-inch blade length suits most standard layout tasks on framing, pipe runs, conduit bends, and sheet metal. The protractor head extends utility to angle transfer and bevel work, while the center head is useful for locating the center of round stock. The 16R graduation style is a widely recognized standard in the trades, making this set compatible with common measurement workflows on job sites and in service shops.

Key Features

• 12-inch steel blade with 16R graduation in 1/32, 1/64, 1/100, and 1/50 inch increments
• Three interchangeable head types: square head, center head, and protractor head
• Cast iron heads provide rigidity and resistance to wear under repeated use
• Hardened steel blade resists flex and maintains accuracy across its length
• 4-piece set covers angle transfer, center-finding, and square layout in one kit

Compatibility

Designed as a general-purpose OEM-style combination square set suitable for layout and inspection applications across HVAC, plumbing, electrical, and light fabrication trades.

Installation Notes

Combination square sets require no installation and are a hand tool used by licensed tradespeople for layout and measurement tasks. Keep the blade and head locking mechanism free of debris to maintain accurate blade positioning during use. Inspect the square head for flatness periodically, as impact damage to cast iron heads can affect measurement accuracy. Store the set in a dry environment to prevent corrosion on the steel blade.